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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | // SPDX-License-Identifier: GPL-2.0 /* * AD5672R, AD5674R, AD5676, AD5676R, AD5679R, * AD5681R, AD5682R, AD5683, AD5683R, AD5684, * AD5684R, AD5685R, AD5686, AD5686R * Digital to analog converters driver * * Copyright 2018 Analog Devices Inc. */ #include "ad5686.h" #include <linux/module.h> #include <linux/spi/spi.h> static int ad5686_spi_write(struct ad5686_state *st, u8 cmd, u8 addr, u16 val) { struct spi_device *spi = to_spi_device(st->dev); u8 tx_len, *buf; switch (st->chip_info->regmap_type) { case AD5310_REGMAP: st->data[0].d16 = cpu_to_be16(AD5310_CMD(cmd) | val); buf = &st->data[0].d8[0]; tx_len = 2; break; case AD5683_REGMAP: st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5683_DATA(val)); buf = &st->data[0].d8[1]; tx_len = 3; break; case AD5686_REGMAP: st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr) | val); buf = &st->data[0].d8[1]; tx_len = 3; break; default: return -EINVAL; } return spi_write(spi, buf, tx_len); } static int ad5686_spi_read(struct ad5686_state *st, u8 addr) { struct spi_transfer t[] = { { .tx_buf = &st->data[0].d8[1], .len = 3, .cs_change = 1, }, { .tx_buf = &st->data[1].d8[1], .rx_buf = &st->data[2].d8[1], .len = 3, }, }; struct spi_device *spi = to_spi_device(st->dev); u8 cmd = 0; int ret; switch (st->chip_info->regmap_type) { case AD5310_REGMAP: return -ENOTSUPP; case AD5683_REGMAP: cmd = AD5686_CMD_READBACK_ENABLE_V2; break; case AD5686_REGMAP: cmd = AD5686_CMD_READBACK_ENABLE; break; default: return -EINVAL; } st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)); st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP)); ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t)); if (ret < 0) return ret; return be32_to_cpu(st->data[2].d32); } static int ad5686_spi_probe(struct spi_device *spi) { const struct spi_device_id *id = spi_get_device_id(spi); return ad5686_probe(&spi->dev, id->driver_data, id->name, ad5686_spi_write, ad5686_spi_read); } static void ad5686_spi_remove(struct spi_device *spi) { ad5686_remove(&spi->dev); } static const struct spi_device_id ad5686_spi_id[] = { {"ad5310r", ID_AD5310R}, {"ad5672r", ID_AD5672R}, {"ad5674r", ID_AD5674R}, {"ad5676", ID_AD5676}, {"ad5676r", ID_AD5676R}, {"ad5679r", ID_AD5679R}, {"ad5681r", ID_AD5681R}, {"ad5682r", ID_AD5682R}, {"ad5683", ID_AD5683}, {"ad5683r", ID_AD5683R}, {"ad5684", ID_AD5684}, {"ad5684r", ID_AD5684R}, {"ad5685", ID_AD5685R}, /* Does not exist */ {"ad5685r", ID_AD5685R}, {"ad5686", ID_AD5686}, {"ad5686r", ID_AD5686R}, {} }; MODULE_DEVICE_TABLE(spi, ad5686_spi_id); static struct spi_driver ad5686_spi_driver = { .driver = { .name = "ad5686", }, .probe = ad5686_spi_probe, .remove = ad5686_spi_remove, .id_table = ad5686_spi_id, }; module_spi_driver(ad5686_spi_driver); MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>"); MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs"); MODULE_LICENSE("GPL v2"); MODULE_IMPORT_NS(IIO_AD5686); |